230951
The centromere or primary constriction of the chromosome contains rings of proteins that are intimately associated with a spindle fibre. These rings are called
1 centrioles
2 secondary constriction
3 asters
4 kinetochores
Explanation:
D Kinetochore is a proteinaceous structure assembles around the centromere of chromosome which helps in binding in spindle microtubule. The kinetochore is the region which is present in the center of the chromosome.
[BHU PMT (Screening)-2010]
Cell cycle and Cell Division
230953
During meiosis-I, the number of chromosomes is
1 Halved
2 Tripled
3 Doubled
4 Quadrupled
Explanation:
A A special kind of cell division that reduces the chromosome number by half result in the production of haploid daughter cell. This kind of division is called meiosis. Meiosis-I is initiated after the parental chromosomes have replicated to produce identical sister chromatids at the \(\mathrm{S}\) shape.
[J and K CET-2015]
Cell cycle and Cell Division
230954
Which is correct for meiotic metaphase \(\mathbf{- 1}\) ?
1 Bivalents are arranged at equator
2 Univalents are arranged at equator
3 Non-homologous chromosomes forms pair
4 Spindle fibres are attached at chromomere
Explanation:
A During metaphase-I the bivalent chromosomes align on the equatorial plate. The microtubules from the opposite poles of the spindle attached to the kinetochore of homologous chromosomes.
[J and K CET-2006]
Cell cycle and Cell Division
230955
The chromosome becomes gradually visible with compaction of chromosomes during the meiotic stage
1 diplotene
2 leptotene
3 zygotene
4 pachytene
Explanation:
B Chromosomes are visible as long and slender threads. They are much finer than those in mitotic prophase. each chromosome has replicated and consist of two sister chromatics.
230951
The centromere or primary constriction of the chromosome contains rings of proteins that are intimately associated with a spindle fibre. These rings are called
1 centrioles
2 secondary constriction
3 asters
4 kinetochores
Explanation:
D Kinetochore is a proteinaceous structure assembles around the centromere of chromosome which helps in binding in spindle microtubule. The kinetochore is the region which is present in the center of the chromosome.
[BHU PMT (Screening)-2010]
Cell cycle and Cell Division
230953
During meiosis-I, the number of chromosomes is
1 Halved
2 Tripled
3 Doubled
4 Quadrupled
Explanation:
A A special kind of cell division that reduces the chromosome number by half result in the production of haploid daughter cell. This kind of division is called meiosis. Meiosis-I is initiated after the parental chromosomes have replicated to produce identical sister chromatids at the \(\mathrm{S}\) shape.
[J and K CET-2015]
Cell cycle and Cell Division
230954
Which is correct for meiotic metaphase \(\mathbf{- 1}\) ?
1 Bivalents are arranged at equator
2 Univalents are arranged at equator
3 Non-homologous chromosomes forms pair
4 Spindle fibres are attached at chromomere
Explanation:
A During metaphase-I the bivalent chromosomes align on the equatorial plate. The microtubules from the opposite poles of the spindle attached to the kinetochore of homologous chromosomes.
[J and K CET-2006]
Cell cycle and Cell Division
230955
The chromosome becomes gradually visible with compaction of chromosomes during the meiotic stage
1 diplotene
2 leptotene
3 zygotene
4 pachytene
Explanation:
B Chromosomes are visible as long and slender threads. They are much finer than those in mitotic prophase. each chromosome has replicated and consist of two sister chromatics.
230951
The centromere or primary constriction of the chromosome contains rings of proteins that are intimately associated with a spindle fibre. These rings are called
1 centrioles
2 secondary constriction
3 asters
4 kinetochores
Explanation:
D Kinetochore is a proteinaceous structure assembles around the centromere of chromosome which helps in binding in spindle microtubule. The kinetochore is the region which is present in the center of the chromosome.
[BHU PMT (Screening)-2010]
Cell cycle and Cell Division
230953
During meiosis-I, the number of chromosomes is
1 Halved
2 Tripled
3 Doubled
4 Quadrupled
Explanation:
A A special kind of cell division that reduces the chromosome number by half result in the production of haploid daughter cell. This kind of division is called meiosis. Meiosis-I is initiated after the parental chromosomes have replicated to produce identical sister chromatids at the \(\mathrm{S}\) shape.
[J and K CET-2015]
Cell cycle and Cell Division
230954
Which is correct for meiotic metaphase \(\mathbf{- 1}\) ?
1 Bivalents are arranged at equator
2 Univalents are arranged at equator
3 Non-homologous chromosomes forms pair
4 Spindle fibres are attached at chromomere
Explanation:
A During metaphase-I the bivalent chromosomes align on the equatorial plate. The microtubules from the opposite poles of the spindle attached to the kinetochore of homologous chromosomes.
[J and K CET-2006]
Cell cycle and Cell Division
230955
The chromosome becomes gradually visible with compaction of chromosomes during the meiotic stage
1 diplotene
2 leptotene
3 zygotene
4 pachytene
Explanation:
B Chromosomes are visible as long and slender threads. They are much finer than those in mitotic prophase. each chromosome has replicated and consist of two sister chromatics.
230951
The centromere or primary constriction of the chromosome contains rings of proteins that are intimately associated with a spindle fibre. These rings are called
1 centrioles
2 secondary constriction
3 asters
4 kinetochores
Explanation:
D Kinetochore is a proteinaceous structure assembles around the centromere of chromosome which helps in binding in spindle microtubule. The kinetochore is the region which is present in the center of the chromosome.
[BHU PMT (Screening)-2010]
Cell cycle and Cell Division
230953
During meiosis-I, the number of chromosomes is
1 Halved
2 Tripled
3 Doubled
4 Quadrupled
Explanation:
A A special kind of cell division that reduces the chromosome number by half result in the production of haploid daughter cell. This kind of division is called meiosis. Meiosis-I is initiated after the parental chromosomes have replicated to produce identical sister chromatids at the \(\mathrm{S}\) shape.
[J and K CET-2015]
Cell cycle and Cell Division
230954
Which is correct for meiotic metaphase \(\mathbf{- 1}\) ?
1 Bivalents are arranged at equator
2 Univalents are arranged at equator
3 Non-homologous chromosomes forms pair
4 Spindle fibres are attached at chromomere
Explanation:
A During metaphase-I the bivalent chromosomes align on the equatorial plate. The microtubules from the opposite poles of the spindle attached to the kinetochore of homologous chromosomes.
[J and K CET-2006]
Cell cycle and Cell Division
230955
The chromosome becomes gradually visible with compaction of chromosomes during the meiotic stage
1 diplotene
2 leptotene
3 zygotene
4 pachytene
Explanation:
B Chromosomes are visible as long and slender threads. They are much finer than those in mitotic prophase. each chromosome has replicated and consist of two sister chromatics.
